lithoheterotrophic

METPO:1000648 · CLASS · REVIEWED

A trophic type in which an organism obtains energy from the oxidation of inorganic compounds while using organic compounds as the primary carbon source for biosynthesis.

Lithoheterotrophic inorganic energy and organic carbon use

DOI-backed graph linking inorganic electron donors, Fe(II) oxidation, respiratory energy conservation, organic carbon uptake, precursor metabolites, and biomass.

Lithoheterotrophic inorganic energy and organic carbon use Interactive directed graph showing evidence-backed causal relationships for lithoheterotrophic.

Edge evidence

  • lithoheterotrophic uses electron donor inorganic electron donor METPO:2000009

    Lithoheterotrophy uses inorganic compounds as energy-generating electron donors.

    • DOI:10.1016/B978-0-12-378630-2.00219-X oxidize inorganic atoms or molecules Supports inorganic chemical oxidation as lithotrophic energy metabolism.
  • ferrous iron example of inorganic electron donor rdfs:subClassOf

    Fe(II) is an example inorganic electron donor for lithotrophic growth.

    • DOI:10.1038/s41598-021-81412-3 Fe(II) as the energy source Supports Fe(II) oxidation as the energy source in engineered lithoheterotrophy.
  • inorganic electron donor feeds electrons into respiratory chain METPO:2007402

    Oxidation of inorganic donors feeds respiratory electron transport.

    • DOI:10.1016/j.bbabio.2008.09.008 membrane-bound electron transport chain Supports respiratory chains as energy-conserving redox systems.
  • respiratory chain transfers electrons to molecular oxygen METPO:2007403

    Aerobic Fe(II)-oxidizing lithotrophy can reduce oxygen.

    • DOI:10.1038/s41598-021-81412-3 oxidation of Fe(II) coupled to the reduction of oxygen Supports oxygen reduction coupled to Fe(II) oxidation.
  • respiratory chain produces ATP METPO:2000202

    Respiratory electron transport supports ATP synthesis.

    • DOI:10.1016/j.bbabio.2008.09.008 drives ATP synthesis Supports ATP synthesis from respiratory energy conservation.
  • lithoheterotrophic uses carbon source organic carbon METPO:2000006

    Lithoheterotrophy uses organic compounds as carbon sources.

    • DOI:10.1038/s41598-021-81412-3 glucose as the sole carbon source Supports organic carbon use under Fe(II)-oxidizing lithoheterotrophic conditions.
  • glucose example of organic carbon rdfs:subClassOf

    Glucose is an experimentally supported organic carbon source.

    • DOI:10.1038/s41598-021-81412-3 glucose as the sole carbon source Supports glucose as the organic carbon source in the engineered strain.
  • organic carbon converted to precursor metabolites

    Organic carbon supplies biosynthetic precursors.

    • DOI:10.1038/s41598-021-81412-3 biomass precursors provided by glucose Supports glucose-derived carbon as a source of biomass precursors.
  • precursor metabolites incorporated into biomass biolink:part_of

    Organic-carbon precursors are incorporated into cellular material.

    • DOI:10.1016/B978-012373944-5.00083-3 incorporation of a compound into biomass Supports assimilation of compounds into biomass.
  • microaerobic conditions supports Fe(II) oxidation

    Microaerobic conditions support Fe(II)-oxidizing growth by limiting abiotic Fe(II) oxidation.

    • DOI:10.1038/s41598-021-81412-3 requiring microaerobic conditions because atmospheric O2 abiotically oxidizes Fe(II)
  • ferrous iron oxidized in Fe(II) oxidation

    Ferrous iron is the substrate oxidized in the energy-yielding Fe(II) oxidation process.

    • DOI:10.1038/s41598-021-81412-3 the oxidation of Fe(II) coupled to the reduction of oxygen
  • Fe(II) oxidation feeds electrons into respiratory chain METPO:2007402

    Fe(II) oxidation provides electrons for respiratory energy conservation.

    • DOI:10.1038/s41598-021-81412-3 Fe(II) oxidation provides energy while organic carbon serves primarily as the carbon source
  • sulfide example of inorganic electron donor rdfs:subClassOf

    Sulfide is an inorganic electron donor for lithotrophic sulfur oxidation.

    • DOI:10.1038/s41467-025-56588-1 sulfide oxidation as lithotrophic energy metabolism in nitrate-reducing chemolithotrophs/heterotrophs
  • sulfide:quinone oxidoreductase (SQR) oxidizes sulfide METPO:2000016

    SQR catalyzes oxidation/detoxification of sulfide as a sulfide-oxidation module.

    • DOI:10.1038/s41467-025-56588-1 a key enzyme that can catalyze sulfide detoxification in nitrate-reducing chemolithoautotrophs
  • thiosulfate example of inorganic electron donor rdfs:subClassOf

    Thiosulfate is an inorganic sulfur electron donor for lithotrophic oxidation.

    • DOI:10.1038/s41467-025-56588-1 periplasmic sox gene clusters encoding for thiosulfate oxidation
  • periplasmic Sox system oxidizes thiosulfate METPO:2000016

    The periplasmic Sox system encodes oxidation of thiosulfate.

    • DOI:10.1038/s41467-025-56588-1 periplasmic sox gene clusters encoding for thiosulfate oxidation
  • conductive pili and c-type cytochromes enables direct interspecies electron transfer RO:0002327

    Conductive pili and outer-surface c-type cytochromes enable direct interspecies electron transfer.

    • DOI:10.3390/life14050591 direct interspecies electron transfer (DIET) via conductive pili and outer-surface c-type cytochromes

Provenance

Source
METPO (2025-11-25)
Author
Jed Dongjin Kim-Ozaeta
Definition source
DOI:10.1038/s41598-021-81412-3

Parent traits (1)

Synonyms (1)

  • lithoheterotroph RELATED_SYNONYM · metpo.owl

kg-microbe context

Matched 1 kg-microbe node via direct_metpo.

  • METPO:1000648 [-0.997, -3.520, -5.312, -0.246, …]

512-dim DeepWalkSkipGramEnsmallen embedding from kg-microbe (2026-04-25).

Nearest neighbors in embedding space

Top-8 cosine-similar METPO traits from the 2026-04-25 deepwalk (512-D).

Curation history

  1. · SEEDED_FROM_METPO · seed_from_metpo

    imported from data/raw/metpo.owl (CLASS)

  2. · ADDED_CAUSAL_GRAPH · codex

    Added DOI-backed causal graph for inorganic electron donor oxidation, Fe(II), respiratory energy conservation, organic carbon use, and biomass formation.

  3. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 3 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (METPO:2000009×1, METPO:2000202×1, METPO:2000006×1).

  4. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 2 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (rdfs:subClassOf×2).

  5. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 2 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (METPO:2007402×1, METPO:2007403×1).

  6. · GROUND_CAUSAL_NODES · claude

    Grounded 3 causal-node grounding field(s) via mappings/node_grounding.tsv (CHEBI:29033×1, CHEBI:50860×1, GO:0022904×1).

  7. · GROUND_CAUSAL_NODES · claude

    Grounded 2 causal-node grounding field(s) via mappings/node_grounding.tsv (METPO:1007502×1, METPO:1007501×1).

  8. · RETYPE_CAUSAL_NODES · claude

    Re-typed 1 causal-node node_type field(s) to align with CausalNodeTypeEnum semantics: biomass: BIOLOGICAL_PROCESS → CHEMICAL ×1.

  9. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 1 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (biolink:part_of×1).

  10. · ENRICH_CAUSAL_GRAPH · claude

    Added 8 evidence-backed generic edges (8 new nodes) from the deep-research report.

  11. · GROUND_CAUSAL_PREDICATES · claude

    Grounded 6 causal-edge predicate_id field(s) via mappings/predicate_grounding.tsv (rdfs:subClassOf×2, METPO:2000016×2, METPO:2007402×1, RO:0002327×1).

  12. · GROUND_CAUSAL_NODES · claude

    Grounded 2 causal-node grounding field(s) via mappings/node_grounding.tsv (CHEBI:15138×1, CHEBI:16094×1).